1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf043958cfd36b107afafcf6cf8f95ed1a8175f65b9751e39c3dc1f4df8be7330. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92ab1d9b-992c-4619-bcd6-04ee6f423617.json and https://artists.proofprofile.net/proofs/artist/92ab1d9b-992c-4619-bcd6-04ee6f423617.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7258dcedfd7d55ee87bc6c7eead275ac07704b24dd478764125e29a7fb82dec5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA72269675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfea498cd66a356d0595fb964ae646975cd3213e84c819bda50be7878f8e1cd. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82266643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e3eb80106a76be34a5b96e81267a04d9e103a28d92f4a3fcdee8389c20529. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2215810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2dd9f1fd5946e12b96ec1f9569895d3960ef7c397bc572de0f6b820f3f7a49. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2282152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a90661bd8ac02195269f0b861d2419cbe0a5db9d29c492c5add04b9330e1d30. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6K2303042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324af0b288de0ae2b1995172341bed61fa47ccbe4df208b54543217d2ba8aff4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2308269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee84120cda7ef9879627c20ebbb0094c77ed4b7f36cb20c07448ed675e3bd22b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2352992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a241f482a1926008985eb7cada720a0e881d6746c79c0bd04c605f161cb90be. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aaa0e0d9bf796650bea74e491dbee4ee41b34eb92d31d6ea2919ca73938c5a. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751d0cd6ee9db964e25c7fa8a5201f0d453bc850017bba2f2d11bc7d44d7d0b7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a116c495bd6d04fb3c21d462f36d723aa52d9c635986b95f6fac4a4da6f47ef. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093e6c79f0b0075a38624ace6833ac348de58cd62842f422f48af6d803e22fb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a241f482a1926008985eb7cada720a0e881d6746c79c0bd04c605f161cb90be. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd631d9a88c6e87ce86bcffccc6f8450b553369164c064d6d0457a2ccc52553. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06af72639c63772b4861b25fbbfd0209ff07a9fd75e775f6f028f1339eaca7ed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935abd77ae6bc27636ec57090c53cc9b9313526bfc1be2c9ff0c80ce70ca1565. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGAAX2300544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59aa44e921a6307f3344300d146a147c681d27c1fdbfbd3bf14b984b671ae7c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2393574.